Sheet-inverting apparatus for use in connection with printing-machines.



T. R.'G. PARKER. SHEET INVERTING AIEPAEATUS FOR USE IN GONNEOTION WITH PRINTING MAGHINES.

APPLICATION FILED JULY 22, 1907.

Patented Nov. 9, 1909.

- 14 SHEETS-SHEET 1.

M R. RA -n fnumiar M T. R. G. PARKER.

SHEET INVERTING APPARATUS FOR USE INGONNEGTION WITH PRINTING MACHINES. APPLICATION IILBD JULY 22,1907.

939,541. I I Patented N0v..9,1909.

14 SHEETS-SHEET 2.

. v QIRWM- mnazw. B. GRAHAM c0.. PMoY0-Lrm0GRAPMERs. WASHINGTON. n. c

T. R. G. PARKER.

SHEET INVER'IINC APPARATUS FOR USE IN CONNECTION WITH PEINTIN G MACHINES.

' APPLICATION FILED JULY 22,1901.

939,541; Patented Nov. 9, 1909.

14 SHEETS-SHEET 3.

Aunnsw B, GRAHAM c0.. mtwmpmcmr'mm msmnumy. 9.41,

T. R. G. PARKER.

SHEET INVBRTING APPARATUS FOR USE IN GONNEGTION WITH PRINTING MACHINES.

I VAPPLIOATION FILED JULY 2 2, 1907.

Patented Nov. 9, 1909.

14 SHEETS-SHEET 4.

. 'ZWW AHDMW. E uiAlllM 00.. momumocwms Aswm on. n. c.

T. R. G. PARKER. SHEET INVBRTING' APPARATUS FOR USE IN CONNECTION WITH PRINTING MACHINES. APPLICATION FILED JULY 22,1907.

939,541 Patented Nov. 9, 1909.

14 SHEETS-BR13315- Wham; I [ma/afar T. R. G. PARKER. SHEET INVERTING APPARATUS FOR USE IN CONNECTION WITH PRINTING MACHINES.

APPLICATION FILED JULY 22,1907.

14 SHEETS-SHEET 6.

Patented Nov. 9, 1909.

A T. R. G. PARKER. SHEET INVERTING APPARATUS FOR USE IN GONNEQTION- WITH PRINTING MACHINES.

. APPLIUATION FILED JULY 22,1907. 939,541. Patented N0v.9, 1909.

- 14 SHEETS-SHEET 7.

@Q Q WQM A /7 T. R. G. PARKER. I SHEET INVBRTING APPARATUS FOR USE IN CONNECTION WITH PRINTING MACHINES.

APPLICATION FILED JULY 22, 1907. 4 939,541 Patented Nov.9, 1909..

14 SHEETS-SHEET 8.

Wfwwaf \EQ MAQM Aunniw. 1v GRAMAIA cu Pmoumomuwws. wAMmi'an. n c

T. R, 9. PARKER.

SHEET 'INVERTING APPARATUS FOR USE IN GONNEGTION WITH PRINTING MACHINES. APPLIOATION FILED JULY 22,1907.

Patnted Nov.9. 1909.

14 SHEETS-SHEET 9.

T. R. G. PARKER. SHEET INVERTING APPARATUS FOR USE I CONNECTION WITH PRINTING MACHINES.

APPLICATION FILED JULY 22,1907 939,541 Patented Nov. 9. 1909.

14 Sums-sum. 10.

mm icmwo; m? MAM T. R. G. PARKER. SHEET INVERTING APPARATUS FOR USE IN GONNBGTION WITH PRINTING MACHINES.

APPLICATION FILED JULY 22, 1907.

' Patented Nov. 9, 1909.

14 SHEBTQ-BHBET 11.

:w a unmu c0 wmmmuncnvnena wnsumarou, a. a. mum

. T. R. G. PARKER. SHEET INVERTING APPARATUS FOR USE IN CONNECTION WITH PRINTING MACHINES.

APPLIOATION FILED JULY 22.1907. 939,541 Patented Nov. 9. 1909.

14 SHEETS-SHEET 12.

1% Wmmrw' \5' 4 I v m wQmAQI-IM A Amw. a. mu co. mumoummzns. wnsnmm'on. u c.

1'. me. PARKER. SHEET INVERTING APPARATUS FOR USE IN CONNECTION WITH- PRINTING MACHINES. APPLICATION FILED JULY 22, 1907.

939,541 Patented Nov. 9. 1909.

14 SHEETS-$31311 13.

KM QQQALK wnwsas flwmtar (9W V ZMJIQE '1. R. G. PARKER. SHEET INVERTING APPARATUS FOR USE IN CONNECTION WITH PRINTING MAGHINBS.

APPLICATION PILED JULY 22, 1907. 939,541; Patented Nov. 9,1909.

14 SHEETS-SHEET 14.

UNITED STATES P T NT OFFICE.

THOMAS ROBERT GILLETT PARKER, OF BROADI-IEATH, ENGLAND, ASSIGNOB TO LINO- TYPE AND MACHINERY LIMITED, OF LONDON, ENGLAND.

SHEET-INVERTING APPARATUS FOR USE IN CONNECTION WITH PRINTING-MACHINES.

Specification of Letters Patent.

Patented Nov. 9, 1909.

Application filedJuly 2'2, 190?. Serial No. 384,960.

T 0 all whom it may concern: Y

Be it known that I, THoMAs ROBERT, GIL- LETT PARKER, a subject of the King of the United Kingdom of Great Britainand Ireland, residing at The Linotype Works, Broadheath, in thecounty of Chester, England, have invented new and useful Improvements in Sheet-Inverting Apparatus for use in Connection with, Printing-Machines, of which the following'is a specification.

This invention relates to sheetjinverting apparatus for use in connection with print ing machines especially such machines. as are arranged in what is known as tandem and, when so arranged, capable of being used either cooperatively for producingperfected work, or multi-color work on one side of the sheets, or jobs with one or more impressions on one side and multi-color impressions on the other side, or independently of each other, for enabling the machines to be used separately for'producing a number of separate jobs, each the result of a difierent machine of the series.

The invention relates particularly to that class of apparatus in which each sheet, after receiving its impression in the first printing couple, is seized, withdrawn transversely from its general line of travel, inverted, and forthwith moved transversely into the line of travel, thence to be fed to the next printing couple with the white or blank side in position for receiving the impression in' that couple; in this said apparatus there are also provided means whereby the sheet inverter may be rendered ineffective so that the sheets shall be fed to the second printing couple in an uninverted condition for receiving the second impression on the first one forv producing inulti-color work, and also, if de sired, means for enabling the sheets to be delivered directly onto thedelivery boards of the respective machines.

Such a sheet inverter asthatjust mentioned, is described in the specification of application for Letters. Patent Serial Number 361,538 filed March 9th 1907 but in that inverter the inversion involves the turning of the printed surface'inwar'd over or around a shaft with which it may come into contact and thereby become smeared. The sheet inverter according to the present invention is constructed so that the said inversion is effected by turning the sheet .withthe printed side out-ward, and consequently without bringing the newly-printed surface into con tact with any of the parts of the mechanism.

In the accompanying drawings, which are to be taken as part of this specification and read therewith F igure 1 is the left-hand portion,Fig. 1 the middle portion, and Fig. 1 the right-hand portion of a side elevation of apparatus constructed according to the present invention, this elevation being taken from the feeder side; Fig. 2 is an elevation of a detached portion of Fig. 1 shown inadifferent position of adjustment; Figs. 3 and 3 together form the left-hand portion, and Figs. 3 and 3 together form the right-hand portion of a plan, partly broken away,of the apparatus shown in Figs. 1, 1 and 1 Fig. 4c is the left-hand portion, Fig. 4 the middle portion, and Fig. 4 the right-hand portion of a transverse vertical section, partly broken away, on the line l%l 0f Fig. 5", Figs. 5 and 5 together form the left-hand portion and Figs. 5" and 5 together form the right-hand portion of an elevation as viewed from the gear side ofFigs. 3,333 and 3. Fig.6 is a transverse section, somewhat similar to Figs. 4 and 4*, but showing a modified arrangement of the apparatus, and Fig. 7 is an elevation, partly broken away, of the arrangement shown in lflig.v 6, as seen. from the gear side thereof. 1 The various figures are drawn to different scales.

For facilitating the understanding of the invention, the general description of the apparatus which is afterward given is prefaced by a brief description of part of the operations of the said apparatus.

The sheets 43, Figs. 4 and 4* after receiving their impression in the first printing couple, from which they may be delivered by delivery tapes 71, Fig. 1 or otherwise, are directed by switches 72, 73 (shown in dotted lines in that figure) to two sets of inclined carrier tapes 7 1, 75 by and between which they are conveyed up to an adjustable switch 76 which is pivoted in the fixed frame 77 and provided with a hand lever 78 by which it may e turned into either of the two positions in which it is shown in Figs. l 'and 2 respectively. When this switch is in the position in which it is shown in Fig. 1*, the sheets pass over the top of it and are thereafter conveyed by and between the tapes 74 and a third set of tapes 79, up to and over a horizontal board 80,

after to be conveyed onward by the before mentioned tapes 75 conjointly with a fourth set of tapes 81 until the said sheets are over a second horizontal board 82 herein for con venience referred to as the lower board.

The tapes 74 pass around rollers or pulleys 83, 84, 85, the two latter adjustably secured at the respectively opposite ends of the upper board 80, the lower flights of such tapes traveling in a plane slightly above that containing the upper surface of the said board. The tapes 75 pass around rollers or pulleys 86, 87, 88, 89 and 90, all in contact with their upper flights, while their lower flights are supported on rollers 91, 92. The tapes 79 pass around rollers or pulleys 93, 94 and 95, and over guide rollers 96, while the tapes 81 pass around rollers or pulleys 97 (concentric with 96) 98 and 99.

All of the before named rollers or pulleys are suitably mounted in the frame 77, some of them adjustably so, as hereinafter described.

The shafts of the rollers 94 and 95 have their hearings in eccentric bushes 100 to which are rigidly secured lever arms 101 pivotally connected together by two links 102, one at each end of the said shafts. The shafts of the rollers 88, 89 and 90 are similarly mounted in eccentric bushes 103, having lever arms 104 which are pivotally connected together by two links 105, 106, at

each side of the machine, the links 105 being outside and the links 106 inside the respectively adjacent frame 77.

The links 102 are pivotally connected to the upper ends of two lever arms 107 one fast to each end of a rocking shaft 108 carrying an arm 109 in pivotal connection with another such arm 110 fast to a rocking shaft 111 on which are also fast lever arms 112 whose vibrating ends are pivotally connected to the before mentioned links 105. To one of the lever arms 107, as shown best in Fig. 5 is pivotally connected one end of a link 113 whose other end is similarly con nected with the lower end of a lever 114 free to rock about a fixed axis, and whose upper end is in operative connection with a grooved cam 115 fast to a horizontal cam shaft 116. This shaft is free to rotate in bracket bearings 117 fast to the frame 77 at the gear side of the apparatus and it has fast on it a spur wheel 118 which is rotated through the next described train of gearing.

On the shaft of the intermediate cylinder gear 119, Fig. 3 of the second press, or of each of the presses after the first one, is secured a sprocketwheel 120, which through a chain 121, rotates a sprocket wheel 122 capable of being clutched to and unclutched from another sprocket wheel 123, which, in turn, through a chain 124, transmits rotary motion to a sprocket wheel 125 on a short shaft or stud 126 and in fixed driving connection with a spur wheel 127, see particularly Fig. 4. The spur wheel 127 meshes with a spur wheel 128 fast on a short shaft 129 on which is also rigidly secured a bevel spur wheel 130 gearing with a companion wheel 131 free to rotate on a shaft 132. On the shaft 132 there is also rotatable a spur pinion 133, preferably integral with 131 and gearing with a spur wheel 134 integral with, or rigidly secured to, a spur wheel 1.35 which meshes with the before described wheel 118 on shaft 116. The aforesaid wheels 134, 135 are fast on a shaft 136 on which is also secured a spur wheel 137, Figs. 1, 3" and 5-" gearing with a wheel 138 of the same diameter as 137. The aforesaid gearing is so dovised as to cause the shaft 116 to rotate once and the shafts 132 and 136, say eight times for each cycle of the press, or in other words, for each sheet dealt with.

On the shaft 136 is secured a gripper cyl inder 139 the grippers 140 of which are adapted to be closed by springs (these springs are not shown in the drawings) and opened by cams 141, 142, Fig. 4 the former situated above and the latter situated below the shaft 136 and both of which, at the required times, are moved into and out of the path of an anti-friction roller 143, on a lever arm 144, fast to the gripper shaft 145.

As the gripper cylinder 139, in the example illustrated, is caused to rotate eight times for each sheet dealt with, it becomes necessary to keep the grippers 140 open only for so long as is necessary for them to re ceive and release the sheets, otherwise, their vibrating ends when open, by projecting beyond the periphery of the cylinder 139, would damage the sheets passing over them. To obtain this result the two gripper-opening cams 141, 142 are formed upon the bifurcated arm of a two-armed lever 146 which is free to rock upon a fixed pivot 147 when acted upon by a rotating cam 148 which moves itin one direction, or by a spring or springs (not shown in the drawings) which move it in the other direction; in Fig. 4 the cams 141 and 142 are shown in dotted lines in the position to which they are moved by the cam 148, and in chain lines in the position to which they are moved by the above named spring. The cam 148 is fast to the shaft 116 which, before explained,

makes one rotation for each sheet, and it is of such shape as will suflice for opening the grippers 140 for the necessary shortperiod once during every eight rotations of the gripper cylinder 139.

On the cam shaft 116 there is also secured seem a cam 149 adapted to act on one arm of a bell crank lever 150 pivoted co-axially with the lever 146 and whose other arm is connected by a link 151 to a lever arm 152 fast to a rocking shaft 153. This rocking shaft 153 is mounted in bearing brackets 154 which overhang the upper board 80 as shown best in Figs. 4 and 4, and on the said shaft are secured two arms 155, on the vibrating end of each of which is free to rotate a roller 156. By the action of the cam 149 the rollers 156 are caused to approach and recede fro-m a continuously rotated roller 157 the upper part of whose periphery is practically in the plane of the upper surface of the upper board 80. This continuously rotated roller 157 may receive its motion in any convenient way, in Fig. 4 it is as an example, diagrammatically shown as receiving its motion through a belt 158, its speed of rotation being such as will, after it (conjointly with the rollers 156) has moved the sheets transversely across the upper board, present the appropriate side edges of the sheets to the grippers 140, at which juncture the before described rollers 156 are also raised to relieve the sheet from driving con tact with the roller 157.

Upon the before-described shaft 132 there are secured two sprocket wheels 159 engaging with two endless chains 160, which eX-' tend above and below the lower board 82 and, at the feeder side of such board, pass around two other sprocket wheels 161 the shaft 162 of which is free to rotate in bracket bearings extending inward from the adjacent frame 77. The chains 160 carry a spring-controlled gripper shaft 162 and a gripper bar 163, Fig. 4, and on this shaft are secured grippers 164 adapted, under the influence of the just mentioned spring, to

grip the sheets, between themselves c. the

grippers) and the bar 163. The gripper shaft 162 also has fast to it a lever'arm 165 adapted to be acted upon by two relatively stationary gripper-opening cams 166, 167, the former (166) for opening the grippers when they are to receive the sheets from the gripper cylinder 139 and the latter (167) for opening them when they are to release the sheets to allow them to fall onto the lower board 82. When the sheets are released as last mentioned they fall with their then-following edges against a sheet stop 168 which latter serves to support the sheets during their passage thereover. To allow the gripper shaft 162 and the grippers 164 to pass over the sheet stop 168 the latter is so constructed as to be capable of sliding vertically in or through the lower board 82, a spring 169 and bell-crank lever 170 serving to maintain the sheet'stop in its raised position except at those times at which it is depressed by a cam 171 carried by one or each of the chains 160, and which cam, during the travel of the chains, is adapted to act on the upper edge of a part of the sheet stop 168.

On one end of the before-described cam shaft 116 there is secured a grooved cam 172, see particularly Fig. 5, which is in operative connection with the upper end of a lever 173. The lower end of this lever is connected by a link 174 with a lever arm 175 fast to a rocking shaft 176 carrying arms 177 on each of which is rotatably mounted a roller 178. The last described mechanism is adapted'to raise and lower the rollers 178 relatively to a continuously rotated roller 179 the upper part of whose periphery is situated in the plane of the upper surface of the lower board 82, this last named roller being rotated by any convenient means.

The upper board 80 is provided with a suitable sheet stop 180 up to which the sheets are fed by the tapes 74 and 79, and it is at or about the time that the leading edges of the sheets reach this stop, that the upper fiightsof the tapes are lowered by the turning of the eccentric bushes 100.

By reference to Figs. 4 and 4 it will be seen that the upper board and the lower board 82 have formed in their upper surfaces, grooves 181 and 182 respectively, which are adapted to receive the tapes 79 and 75 respectively when the said tapes are lowered. By these means the tapes are allowed to descend out of contact with the sheets last previously conveyed by them, and the said sheets'are lowered into contact with the respective boards 80 and 82.

When it is desired to invert the sheets during their passage say from the machine 183 Figs. 1 and 3 to the machine 184 Figs. 1 and 3 to obtain perfected work, the switch 76 is turned into the position in which it is shown in Fig. 1*, so that the sheets conveyed upward by the tapes 74, 75, are caused to travel over its upper surface and thereafter to be conveyed onward by the tapes 74 conjointly with the tapes 79. These tapes, as before described, convey each of the sheets 43 forward over the upper board 80 until its leading edge comes into contact with the sheet stop 180 at which juncture the rollers 94, 95 are lowered to allow the tapes 79 to sink into the grooves 181 and the sheet to rest printed side up on the said upper board. At this juncture also, the rollers 1.56 are lowered to press the sheet into frictional propelling contact with the roller 157 which thereupon is caused to movethe sheet transversely out of its general line of travel toward the gripper cylinder 139 whose rotations are so timed that its grippers 140 are in positionand ready to receive the edge of the sheet when the latter is thus moved up to them. The sheet is then gripped by the grippers 140 and guided half around the gripper cylinder 139 that is to say, until the edge engaged by the grippers 140, is immediately beneath the axis of the cylinder 139, in which position it is simultaneously,

- or practically so, released by the grippers 1&9 and secured by the chain grippers 164 which thereafter draw it transversely over the lower board 82 in the reverse direction to that'in which it was moved transversely over the upper board 80 by the rollers 156, 157. \Vhen. the lever arm 165 comes into contact with the fixed cam 167 the chain grippers 164: are opened and the sheet is allowed to fall printed side down on to the lower board 82. At or about this juncture the rollers 17 8 are caused to press the sheet into frictional propelling contact with the roller 179 and the upper flights of the tapes are raised so that the said rollers 17 8, 17 9, conjointly with the tapes 75 and 81, feed the sheet forward to the machine 18%.

lrVhen the sheet is to receive a multi-eolor impression on one and the same side, one impression in machine 183 and the other in machine 184:, the sheet inverter is rendered inoperative by opening the clutch adjacent to the sprocket wheels 122, 123, and the switch 76 is turned into the position in which it is shown in Fig. 2 so that the sheets brought along by the tapes 74 and 75 pass beneath the switch, which directs them beneath the tapes 81, so that these tapes, conjointly with the tapes 75 and the rollers 17 S, 179 serve to convey the sheets printed side up directly over the lower board to the machine 18 1.

When the separate machines are used for printing separate jobs, the switches 72, 73, and tapes 7%, 75, are removed from the apparatus and the ordinary delivery mechanism is brought into use so as to deliver the sheets on to the delivery boards of the re spective machines.

Instead of guiding the sheets .from the upper board to the lower board 82 in the manner previously explained, the same result may be obtained by omitting the beforementioned-grippers 1 12 and, as shown in Figs. 6 and 7, providing switches 1, for guiding the said sheets around the cylinder 139, and also providing a series of rods 2 extending from one chain 160 to the other and imparting to the said chains an intermittent motion. The switches 1 are secured on a stationary bar constituted by what is virtually an extension of the before described pivot 147.

The before mentioned intermittent motion of the chains 160 is obtained by means of a clutch 3 shown in dotted lines in Fig. 7, which is feathered to the shaft 132 near one end thereof, and is capable of being engaged with, and disengaged from, the ad acent sprocket wheel 159 which, and the companion sprocket wheel 159, at the other end of the shaft 132, are secured to a sleeve lwhich is free to rotate about the said shaft. The clutch 3 is operatively connected with the lower end of a lever 5, pivoted, at or about its center, to a stationary bracket 6, and, at its upper end being operatively engaged with a cam 7 fast to the before described. shaft 116.

During the periods of disengagement of the clutch 3 and the consequent non-movement of the chains 160, carrier tapes 8 are caused to ascend between the rods 2 and lift the sheets off them. The tapes 8 pass around rollers 9, 10 which may be rotated by a. belt 11 from the before mentioned roller 88, the said rollers 9 and 10 being capable of being raised and lowered as shown respectively in full and dotted lines in Fig. 7. hen the rollers 9, 10 are in the full line position indicated in Fig. 7, the upper flights of the tapes 8 are above the upper flight of the rods 2, and serve to carry the sheets toward the right, as regarded in that figure, and when the rollers 9, 10 are in the dotted line position, the upper flights of the tapes 8 are below the said upper flight of the rods 2. The rollers 9, 10 are raised and lowered in a manner similar to that previously described in connection with the rollers 88, 89 and 90, their eccentric bushes being operatively connected with those of the last 9 named rollers through a link 12 and lover arm 13. hen, as aforesaid, the tapes 8 are raised to lift the sheet off the rods 2, the pressure roller 17 8 (which is raised and lowered as'in the preceding example) is lowered thereonto so as to hold it in frictional driving contact with the tapes and which propels the sheet over a plate 15 and then between the tapes 75 and 81 which carry the said sheet to the next machine.

The operation of the last described arrangement may be described as follows The sheet having been brought up to the stop 180 as in the first described example, the top flights of the tapes 79 are lowered below the surface of the board 80 and the pressure rollers 156 are lowered on to the sheet so as to press it on to the constantly rotated roller 157, whereby the said sheet is propelled toward the cylinder 139 on to which it is pressed at the margins by rollers 16, and around which it is guided by the switches 1. When the leading edge of the sheet is in the vertical plane containing the axes of the two shafts 132, 1.36, the clutch 3 is moved into driving engagement with the sprocket wheels 159 so that the chains 160 and rods 2 are moved forward at the same speed as the sheet is being delivered by the cylinder 139, the tapes 8 being then in their lower position. hen, as before described, the sheet has been engaged by the tapes 75 and 81, the tapes 8 are lowered to allow the rods to carry another sheet into position.

For enabling the last described arrange 1, c

ment to feed the sheet forward without r eversal, so as to receive a multi-color impression, the tapes 17, which conjoi-ntly with the tapes 79, carry the said sheet into the reverser, travel forward no farther than the roller 88 returning thence to the roller 86' Fig. 1 From the roller 88 the sheets'pass over a guide 18 which supports them until they reach the before described roller 9 when the tapes 8 carry them forward toward the next machine, as will now be well understood without further description; during this operation the rollers 9, 1'0 and tapes 8 are retained in their uppermost position by any suitable means.

The before mentioned series of machines may comprise any desired number of separable units and sheet inverters, the arrangement and number depending upon the particular results required to be, obtained.

I claim 1. In sheet inverting apparatus, the combination of two superposed boards, endless tapes encircling each of them, devices adapted to raise and lower the upper flights of the tapes relatively to the boards, other endless tapes adapted to cooperate with theupper flight of the first-mentioned ones when these flights are raised, for moving the sheets over the respective boards in the general line of travel of such sheets, an adjust able switch adapted to direct the sheets to the upper or lower set of cooperating tapes, sheet guiding devices adapted to guide the sheets from the upper side of the upper board to the under side thereof in a direction transverse to their general, line of travel, and rollers adapted to nip the sheets and move them off the lower board in the direction of their general line of travel.

2. In sheet inverting apparatus, the combination of two superposed boards, endless tapes encircling each of them and adapted to move the sheets over the respective boards in the general line of travel of such sheets, sheet guiding devices adapted to guide the sheets from the upper side of the upper board to the under side thereof in a direction transverse to their general line of travel,

and devices adapted to move the sheets off the lower board in the direction of their general line of travel.

3. In sheet inverting apparatus, the combination of two superposed boards, end= less tapes encircling them and adapted to move the sheets over the respective boards in the general line of travel of such sheets, grooves in the boards adapted to receive the upper flights of the tapes, devices adapted to raise and lower the said flights out of and into the grooves, a gripper cylinder adapted to guide the sheets OK the upper board to the lower board, and devices adapted to move the sheets olf the lower board in the direction of their general line of travel.

4. Insheet inverting apparatus, the combination of'two superposed boards, endless tapes encirc'ling each of them and adapted :to move the sheets thereover in the general line of travel of such sheets, sheet guiding devices adapted to guide the sheets from the upper side of the upper board to the under side thereof in a direction transverse to their general line of travel, endless chains encircling the lower board and adapted to receive the sheets from the last named guiding devices, move them over the said lower board in a direction transverse to their general line of travel, and deliver them to the above named tapes which encircle the lower board.

5. In sheet inverting apparatus, the combination of two superposed boards, endless tapes encircling each of them and adapted to move the sheets thereover in the general line of travel of such sheets, sheet guiding devices adapted to guide the sheet-s from the upper side of the upper board to the under side thereof in a direction transverse to their general line of travel, endless chains encircling the lower board, sheet grippers adapted to receive the sheets from the last named guiding devices, and devices adapted to open the grippers to release the sheets.

6. In sheet inverting apparatus, the combination of two superposed boards, endless tapes encircling each of them and adapted to move the sheets thereover in the general line of travel of such sheets, a gripper cylinder adapted to grip the sheets and guide them from the upper board to the lower board, devices adapted to open the cylindergrippers When they are to receive and release the sheets, endless chains encircling the lower board, grippers carried by these chains and devices adapted to open the chain-grippers when they are to receive and release the sheets.

7 In sheet inverting apparatus, the combination of two superposed boards, a gripper cylinder adapted to grip the sheets and guide them from the upper board to the lower board, endless chains encircling the lower board, grippers carried by these chains, cams adapted to open the two sets of grippers and devices adapted to move the cylinder gripper cams into and out of their operative positions.

8. In sheet inverting apparatus, the combination of two superposed boards, a gripper cylinder adapted to grip the sheets and guide them from the upper board to the lower board, a cam adapted to open the cylinder grippers, when they are to receive and release the sheets, endless chains encircling the lower board, grippers carried by these chains, a cam adapted to open the chain grippers when they are to receive the sheets and another cam adapted to 0 en the chain grippers when they are to re ease the sheets.

9. In sheet inverting apparatus, the combination of a horizontal board endless chains encircling the board, grippers carried by the chains, a sheet stop vertically movable in the board; and a cam carried by the chains adapted to depress the sheet stop to allow the grippers to pass it.

10. Sheet inverting apparatus comprising in combination two superposed sheet conveyers having intermittent sheet conveying action, sheet transferring means operating transversely to said conveyers and adapted to remove a sheet from the upper conveyer and deliver it to the lower conveyer, and timing means adapted to correlate the actions of said conveyers and said transferring means.

11. Sheet inverting apparatus comprising in combination .two superposed sheet conveyers having intermittent sheet conveying action, sheet transferring means operating transversely to said conveyers and adapted to remove a sheet from the upper conveyer, a sheet carrier operative above the lower conveyer and adapted to receive said sheet from said transferring means and move it i over said lower conveyer, and timing means adapted to correlate the actions of said conveyers said transferring means and said car rier.

12. Sheet inverting apparatus comprising in combination two superposed sheet conveyers, raising and lowering means operative upon said conveyers to produce intermittent conveying action, sheet transferring means operating transversely to said conveyers and adapted to remove the said sheet from the upper conveyer and deliver it to the lower eonveyer, a sheet carrier disposed above the lower eonveyer and operative to receive a sheet from said transferring means and move it across said lower conveyer mainly out of contact therewith and timing means adapted to correlate the actions of said carrier and said lower conveyer.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

THOMAS ROBERT GILLET'I PARKER.

Vitnesses VVARWIOK HY. lVnimAus, F. A. CLEMo. 

